I don’t agree. London has a number of medical schools. 2 are BMAT, 3 UKCAT, of which QMUL has a reputation for liking high grades whilst SGUL tends to set a minimum bar then use other criteria to select. Applying just to London is some way from putting all your eggs in one basket.
runout raises a good point. If looking at costs there are quite a few things to consider. Some courses are five years, others, including a couple of the London ones are six, so automatically more expensive. (And student loans are only for 4 years.) For those not interested in specialisation or in intercalation, it is cheaper to look at 5 year courses, whether in London or not.
I would argue that transport is one of London’s advantages, though might depend on where clinical placements are. (Another thing to look at in detail if you are cost conscious. It might be that if there are six month placements out of London you could avoid a London rent for that period.) In her first year DD’s GP placement was in a village so she had to get up at 6.30am to get to the centre of the City to get the once an hour bus. Her eleven non medic flat mates were quite nocturnal and it was pretty inevitable that she had either been kept awake or that someone had stolen her packed lunch from the fridge, or both. Being in a city and able to pick up a sandwich from Greggs would have been great and much better than going hungry. (She ended up keeping a stock of muesli bars in her room.) I think after this experience she would also see the greater academic focus across disciplines in many London universities, with fewer students primarily there for the ‘university experience’, as an advantage.
Though not strictly necessary we ended up buying her a car for her second year. By the end of her course many will have done the same, whereas I expect not many in London will bother. The car proved invaluable during my mother’s recent, final, illness, but again had she been in London she could just have hopped on a train if faced with a family emergency.
Imperial is very good with bursaries, but UCL and others are as well. It is worth asking. Accommodation costs are shooting up in places like Bristol and I am not sure the gap in cost is as big as it was. (DD paid £90pw for her room in a grotty flat last year. This year the landlord asked for and got, £135. In contrast London rents are falling.)